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Accession Number:
AD0670610
Title:
VISCOSITY OF LOW MOLECULAR WEIGHT POLYMER SOLUTIONS OVER THE ENTIRE CONCENTRATION RANGE.
Corporate Author:
PRINCETON UNIV N J FRICK CHEMICAL LAB
Report Date:
1968-05-01
Abstract:
An empirical equation is presented which describes the concentration dependence of the viscosity of low molecular weight 2000 poly propylene oxide solutions over the whole concentration range. The basis for the new equation is a consideration of the finite volume of the polymer molecules in solution. The new empirical equation fits the data extremely well over the whole concentration range for both a very good solvent benzene and a somewhat poorer solvent methylcyclohexane. The hydrodynamic consequences of the thermodynamic interactions between polymer and solvent are reflected in the constants of the equation. A qualitative physical interpretation of this excluded volume equation is based on the limited interpenetration of the hydrodynamic polymer coils. Using the Debye or the Rouse-Bueche DRB formulation for the viscosity of a polymer solution, the proposed equation also describes the relative variation of the segmental or bead friction factor from infinitely dilute solution to bulk polymer. A Stokes law interpretation of the friction factor is shown to be reasonable at infinite dilution. Author
Descriptive Note:
Technical rept.,
Pages:
0025
Contract Number:
N00014-67-A-0151
File Size:
0.00MB
